{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Does blockchain technology have a positive impact on environmental protection?","a":"Carbon emission trading: Blockchain technology can be used for the transaction  and tracking of carbon emission rights. By constructing a transparent and tamper-proof system, blockchain technology can help governments and companies achieve their carbon reduction goals more effectively."}]}],"pr":"f510d5435b548c77473bacc5fc85b8468c29076c147733ac3a39772994ca43de"}